Speed controlling means for spinning machines



Aug. 13,1935. w. A. MAYOR I 2,011,065

SPEED CONTROLLING MEANS FOR SPINNING MACHINES Filed May 19, 1934 Fig.2.

Ifiventor W ilham A. Mayor, Deceased. 15 Eva V- Ma gor, Adm in istratrix.

er ttorneg- Patented Aug. 13, 1935 p SPEED CONTROLLING MEANS IFOR SPINNING MACHINES WilliamA. Mayor, deceased, late of Niskayuna, N.'Y., by ,Eva V. Mayor, administratrix, Lynn, Mass, assignor to General Electric Company, a corporation of New York Application May, 19, 1934, Serial No. 726,587

50mins. (01. 118-32) This invention relates ,to speed controlling means for ring spinningmachines and the like,

and has for its object theprovision ofsimple and:

reliable means for automatically lvarying the speed to give a desirable high operating efficiency.

More particularly, the invention relates to'a means for automatically varying the speed of i the spindle, as the yarn is wound on the bobbin in such a manner as to maintain aconstant tension inthe yarn. 'It will be understood that in filling wind operations, to which this' invention relates in particular, the yarn is wound on the bobbin in conicallayers. At the beginning of the winding operation, however, a' conical base 'is built up on the lower, end of the bobbin, the layers being thereafter conical for the completion of the winding operation. In carrying out this winding operation, the yarn is thus wound on portions of the bobbin of a continually varying diameter. It is an inherent characteristic of ring spinning machines that thetension on the yarn varies inversely with the'diameter of the portion ofthe'bobbin on'which the thread is being Wound, assuming a constant speed for the bobbin. This invention relates to improved means for automaticallytvarying the speed of the spindle directly with the diameter ofthe bob bin, so as to maintain constant tension in" the yarn K In carrying out the invention, linkage mechanism is provided between thespeed controlling means for the spinning machine and an element of the machine having an amplitude of oscillating movement proportional to the amplitude of 5 relativemovement'betweenthe spindle and the ring rail, together with a cam driven inaccord ance with the progressive relative'movementbetweenthe ring rail and the spindle as the bobbin is built up. This cam cooperates with the linkage mechanism so astto give a low base or minimum speed at the beginning ofthe winding operation, and gradually increase this base speed to amaximum base speed after the conical base has been wound. i

For more complete disclosure of the inventio n reference should now befhad to the drawing, Fig. 1 of which. shows speed control means embodying the invention applying'to a typical ring spine.

the essential elements of the s'pinningmachine ing, as the bobbins-are built up and gives the' termediate point on a roller 22 securedto a meme oscillated about its pivot ll, its upper end moves directly cooperating :with the speed varying means are shown. In this particular machine, the ring rail is hired in position, while the spindle is oscillated up, and down and progressively moved downward as the winding operation proceeds. Obviously, however, the spindle may be stationary and the ring railgiven a corresponding movement. l

l The spindle (not shownlis oscillated up and down by means of achain [0 connected thereto and having its other end connected to the end of a shaft II. This shaft H has a threaded portion it and it is continually rotated at a predetermined constant speed by a driving connection (not shown) connecting it to the electric. motor 13 forming the driving means for the entire machine. The shaft 12 is alsoprovided with a splined connection with itssupporting and driving member l4'so that as the shaft rotates, it is moved longitudinally by reason OfitSthIGldGd connection with a nut I5 secured on the upper end of an oscillating arm IS, the lower end of which is provided with a fixed and adjustable pivot IT. This longitudinal movement of the shaft I2 is toward the left, as viewed in the drawspindles a progressive lowering movement with respecttothe ring rail.

[The arm is is oscillated about its pivot ll by means of a cam 18 forming a part of the machine, and driven from the electric motor l3. The cam bearsdirectly on a roller IS on the lower end of. an arm 20,having a fixed and adjustablepivot 2| at its upper end. This arm 20 bears at an in-,

her 23 which is slidably mounted on a guide (not longitudinally thereof. w Thus it will be observed that as the arm I6 is the shaft I 2 back and forth in its splinedponnection with the driving member l4, whereby the spindle is correspondingly oscillated up and down with respect to the'ring rail. The arm I6 is H therefore an element oscillating in accordance with the relative oscillatory movement between the ring rail and the spindle.

With the parts in the, positions, shown, the roller 22 is in its lowermost position, which it occupies during-the main portion ofthewinding operation. [it the beginning of the winding op eration, the roller 22 is in a raised position as compared to that shown, so as to give a shorter amplitude of movement to the arm l6. As will be understood by those skilled in the art, the '55" v the roller 22 to an uppermost position.

This sets the machine for the beginning of a winding operation. During the initial stages, while the conical base is being formed, the gear 25 gradually moves the member 23 downward until, when the conical base has been formed,

the member 23 has arrived at its lowermost position shown, in which the gear 25 no longer engages it. It will further be understood that the point. of the arm 36.

gear 25 is provided with a projection (not shown) on its periphery, which cooperates with a recess in the. upper end of the rack so as to assure proper engagement of the gear with the rack when the spinning machine is reset.

'It will be understood that the mechanism so far described is old in the art, and is shown as typical of. ring spinningmachines for the purpose ofaclearer understanding of the invention. Obviously, however, the invention is applicable to spinning machines having structures different from that shown.

While anysuitable variable speed driving motor l3 maybe used in. accordance with the inven tion, a threer-phase, slip-ring induction motor is shown. The speed of this motor isccntrolled by means. of .a rheostat, 25 shown as having three resistances, .21, .28 and 29 connected respectively in the rotor circuits ofwthe motor, and being variable by means, of a rotatable contact device 3i! having three arms cooperating respectively with the resistances.

The rheostat 26 is operated automatically through suitable linkage mechanism by the joint operation'of. the. cam i3 and'asecond cam 3!. The connection with the camlfi is made through the arm l6. As shown, the contact device 33 is rotated bya rack32 havingits end pivotallyconnected at the point 33 with the upper end of a link 36. The lower end of the link 3 is pivotally connected at the point 35 with the lower end of I an arm 36 having a fixed pivot 37 at its upper oscillat'esQit imparts an oscillatory movement of proportionate amplitude to the link 3 about its pivot 35. This accordingly moves the contact device 38 backand forth, so as to correspondingly increase and decrease the speed of the motor,

1 This control of the speedfrom the cam l3 is'modifiedby, the actionof the cam 3| which bears on a roller it secured to an intermediate The. cam 3i is driven through a suitableworm and worm wheel gear at from a sprocket wheel 12 which is connected through a chain 43; to the driving element M of the shaft i 2. Although the driving element M makes many revolutions during each winding operationfthe driving connection with the cam has such a v high ratio that the cam makes somewhat less than onecomplete revolution during, the winding operation. Thefunction of the.

cam 3! is to gradually increase the base operating speed of the machine as the conical base is being wound on the bobbin. It is provided with a single operating projection 65 which, at the beginning of a winding operation is in a position displaced one-half revolution from that shown in the drawing, so that its point is in engagement with the roller 49. In this position of the cam 31 it will be observed that the arm 36 is displaced somewhat from the position shown in the drawing in' a counter-clockwise direction about the pivot 3?. This displaces the pivot 35 of the link 36 in the same direction thus swinging the link 35 about its pivotal connection 66 with the link 38 as a pivot and moving the rack 32 farther toward the left, whereby the rheostat arm 39 is moved to a position to include the entire amounts of the resistances 21, 28 and 29 in the motor circuits and give the lowest speed of the driving motor.

Assuming now that the shaft i2 has been reset for the. beginning of a winding operation with the roller 22 at the upper limit of its movement in the operation of the machine the motor speed is successively increased and decreased by the rotation of the cam i8. These amplitudes of speed variation gradually increase as the roller 22 is moved downward. At the same time, the cam 3i turns slowly to increase the minimum or base speed. This is shown graphically in Fig. 2. The portion of the curve between the points ll and 48 corresponds with the building up of the conical base, and it is over this portion that the projection G5 on cam Bi functions to gradually. increase the base speed from an initial low value of for example 5300 R. P. M. Thereafter, the roller it] is in engagement with the circular concentric portion of the cam, and consequently the base speed remains unchanged and at its maximum during the completion of the winding operation, the motor speed then being controlled solely by the cam !8 through a definite fixed amplitude. The period between the points ll and 48 (Fig. 2) may represent about minutes, whereas the main winding operation with maximum base speed represented by the remaining portion of the curve may extend over a period of seven or eight hours.

With the various parts in the positions shown in the drawing the spindle occupies its lowermost position and the machine as indicated by the position of the cam 31 is carrying out the main winding operation with fixed highest base speed at which it is operating. This highest base speed may for example be. 6300 R. P; M., witha maximum speed of 7000 R. P. M.

It will be observed that the portion of the curve 4'li8 indicates gradually increasing amplitudes of the successive speed variations.

This is due to the fact that'at the beginning'of the winding operation the member 23 and hence the roller 22 carried by it is in its uppermost position and consequently the cam i8 is effective to give only a relatively short oscillatory movement to the arm it. As the roller 22 is moved downward this oscillatory movement of the arm is increases with increasing amplitude of speed variation up to the final position shown in the drawing.

It will be understoodthat when the machine is reset manually, aspreviously described, the cam 31 is thereby turned back to its initial posi tion with the point of the projection in engagementwith the roller 40.

What is claimed as new and desired to secure by Letters Patent of the United States, is:

1. Apparatus for varying the speed of a ring spinning machine or the like, comprising means for varying the speed of the machine,an operat ing connection between said speed varying means i and an element of the machine oscillating in accordance with the relative oscillatory movement between the ring rail and the spindle whereby said speed varying means is oscillated to give a desired amplitude of machine speed variation above a predetermined base speed, and cam means driven in accordance with the progressive relative movement between the ring rail and the spindle for operating said speed varying means independently of said element so as to increase the base speed of the machine independently ofthe amplitude of speed variation of the machine during the winding of a predetermined portion of the bobbin after which said cam means maintains a substantially uniform base speed.

2. Apparatus for varying the speed of a ring spinning machine or the like, comprising means cam means driven in accordance with the pro-,

gressive relative movement between the ring rail and the spindle, and an operating connection between said cam means and said arm, said cam means being provided with an operating portion for moving said arm independently of said element to increase the base speed of the machine independently of the amplitude of speed variation of the machine during the winding of the base of the bobbin, after which said cam means maintains a substantially uniform base speed.

3. Apparatus for varying the speed of a ring spinning machine or the like provided with an oscillating member having a movement corresponding with the relative oscillating movement between the ring rail and the spindle, a speed control device, a link connected to operate said speed control device, a movable pivot for said link, a connection between said link and the oscillating member whereby said link is oscillated about said pivot to operatesaid speed varying means, a cam arranged to move said pivot, and means for driving said cam in accordance with the progressive relative movement between the ring rail and the spindle, said cam having a relatively short operating portion for moving said pivot to gradually increase the base speed of the machine during the winding of the base of the cop, after which said cam maintains a substantially uniform base speed during the main winding operation.

4. Apparatus for varying the speed of a ring spinning machine orthe like provided with an os- .cillating member having a movement corresponding with the relative oscillatory movement between the ring rail and the spindle, a speed control device, an arm, a link connected at one end to said speed control device, a pivotal connection between said link and said arm, a second link forming a connection between the oscillating member and said first link, whereby said first link is oscillated about said pivotal connection on said arm and thereby operates said speed varying means, a cam cooperating with said arm so as to move said pivotal connection, and means for driving said cam in accordance with the progressive relative movement between the ring rail and the spindle, said cam having a relatively short operating portion for gradually increasing the base speed of the machine during'the winding of the base of the cop', after which said cam maintainsa substantially uniform base speed during the main winding.

5. Apparatus for varying the speed of a ringspinning machine or the like provided with an oscillating member having a movement corresponding with the relative oscillatory movement between the ring rail andthe spindle, a speed control device, an arm, a link having one end connected to said speed control device, and its other end pivotally mounted on the free end of said arm, asecond link connecting an intermediate point or said first link to the oscillating member of the spinning machine, whereby said first link is oscillated about its pivotal connection on said arm, a cam cooperating with an intermediate point of said arm, and means for driving said cam in accordance with the progressive relative movement between the ring rail and the spindle as the cop is wound on the spindle, said cam having an operating projection engaging said arm at the beginning of the winding of thecop so as to move the pivot of said first linkand thereby operate said speed control means to progressively increase the base speed of the machine for a predetermined period, after which said cam maintains a substantially uniform base speed.

EVA V. MAYOR, Administratria: of the Estate of William A. Mayor,

Deceased. 1 

